RC Car Steering Hubs: What They Do and How to Upgrade Them

Steering hubs might be small, but they play a big role in how your RC car handles. They connect the steering system to the wheels, allowing you to turn smoothly and precisely. If you've noticed sloppy steering or uneven tire wear, your hubs might be the culprit.

In this guide, we'll explain what steering hubs do, how to spot wear, and how to upgrade them for better performance. Whether you're fixing a broken part or looking to improve handling, this article covers everything you need to know.

What Are RC Car Steering Hubs?

Steering hubs are the components that attach the wheels to the steering linkage. They house the bearings and allow the wheel to rotate while also pivoting for steering. Essentially, they are the connection point between your car's suspension and its wheels.

On many RC cars, the steering hub is part of a larger assembly that includes the steering knuckle and axle. When you turn the transmitter's wheel, the servo moves the linkage, which rotates the hub and turns the wheel. Without a properly functioning hub, your car won't respond accurately to your inputs.

• Steering hubs are also called steering knuckles or uprights in some manuals.
• They are typically made of plastic or aluminum, with metal being more durable.

Signs Your Steering Hubs Need Replacement

Over time, steering hubs can wear out or break, especially if you drive on rough terrain or crash frequently. Common signs include excessive play in the front wheels, uneven tire wear, or a clicking noise when turning. If you notice any of these, inspect your hubs for cracks or deformation.

Another clue is difficulty steering or a feeling of 'sloppiness' in the steering response. This can happen when the hub's bearings wear out or the hub itself becomes loose. Replacing worn hubs can restore precise handling and prevent further damage to other steering components.

• Check for visible cracks or chips on the hub arms.
• If the wheel wobbles when you spin it, the hub or its bearings may be worn.

How to Upgrade Your Steering Hubs

Upgrading to metal steering hubs is a popular choice for enthusiasts looking to improve durability and performance. Aluminum hubs are stronger than plastic, reducing flex during hard cornering and providing a more direct steering feel. They also resist wear better, especially when running brushless motors that add stress to the drivetrain.

Before buying, check your car's manual to ensure compatibility. For example, the RCG Racing Tracer / MT-One Front Upper Suspension Arms (Left/Right) are designed to work with specific models. Similarly, if you own a vehicle like the HPI Racing Venture18 Flux 1985 Toyota Hilux SR5 Brushless, you'll need hubs that match its suspension geometry.

When upgrading, consider the entire steering assembly. Replacing just the hubs might not solve all issues if other parts are worn. It's often wise to upgrade the steering linkage and suspension arms simultaneously for consistent performance.

• Use thread lock on metal-to-metal screws to prevent loosening.
• Apply a small amount of grease to the hub's bearing surface during installation.

Step-by-Step Replacement Guide

Replacing steering hubs is a straightforward job that requires basic tools like a screwdriver and hex wrench. Start by removing the wheel and tire, then disconnect the steering linkage from the hub. Next, remove the axle pin or screw that holds the hub in place.

Once the old hub is off, compare it with the new one to ensure they match. Install the new hub, reattach the linkage, and secure the wheel. After assembly, test the steering by turning the wheels manually to ensure smooth movement without binding.

If you're upgrading to metal hubs, you may need to adjust the steering endpoints on your transmitter to prevent over-travel. This ensures the servo doesn't strain against the new, stiffer components.

• Keep track of small parts like washers and pins in a tray.
• Take a photo of the assembly before disassembly to help with reassembly.

Choosing the Right Upgrade Parts

When selecting upgrade hubs, consider the material, weight, and design. Aluminum hubs are lighter than steel but still offer high strength. Some hubs come with built-in Ackermann geometry adjustments, which can fine-tune steering response for racing.

If you're on a budget, there are also reinforced plastic hubs that offer better durability than stock parts without the cost of metal. Look for hubs that are designed for your specific car model to ensure a perfect fit. For example, the RCG Racing Tracer / MT-One steel Machine Diff. Complete With Metal Cups (Upgrade) is a popular upgrade for that platform, but for steering, you'll want dedicated hub upgrades.

Always read reviews and check compatibility before purchasing. If you're unsure, consult your local hobby shop or the manufacturer's website.

• Check if the hub includes bearings or if you need to reuse the old ones.
• High-quality hubs may come with a warranty or guarantee.

Upgrading your RC car's steering hubs is a simple yet effective way to improve handling and durability. By recognizing the signs of wear and following the replacement steps, you can keep your car performing at its best. Whether you choose plastic or metal, a well-maintained steering system makes all the difference on the track.